Ecology

The Earth's temperature has risen because of...

When the ice caps melt, huge pieces of ice fall into the sea and ...

Burning ..... such as oil and coal causes air pollution

It's sunny today. I ..... switch the lights off

I ..... help with the clean-up day next month

If I have time, I .... to the clean-up day

If I were you, I .... save the environment

A: Bill, can you help me with my school project?

B:

The jars are made of ....

The bag is made of ...

Because of ....., some sparrows don't hear their youngs

Animals like bats and owls, for example, rely on their hearing to find their .....